We use this expression to say that we are in the same situation as someone, or have had the same – usually negative – experience.
You can use this phrase in ………… language.
A: I hate shopping on Marianne Days.
B: Join the club. Everywhere is so crowded, you can’t even move!
A: I really do not get on well with the new boss
B: Join the club. I was much happier under the old one.